# Factory ROM Booting

Pressing and holding the green button while connecting the USB, the T71 will enter 'Factory ROM Booting' mode.

<figure><img src="https://1681470171-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FPXCFQOBxeQet2mkpvOzb%2Fuploads%2FLFx4amcq9rUQgZl97rcD%2Fimage.png?alt=media&#x26;token=e9d7d936-c85a-4121-8440-94b94848849d" alt="" width="375"><figcaption></figcaption></figure>

'Factory ROM Booting' is a recovery mode designed to handle cases where the application firmware is corrupted. In this mode, the LCD, LED, and buttons will not function.&#x20;

Therefore, care should be taken under normal circumstances to avoid entering Factory ROM Booting.&#x20;

If, by mistake, the device enters Factory ROM Booting, perform a '[forced reset](https://doc-kr.qudelix.com/t71/getting-started/system-force-reset)' to resolve the issue.

***

## Recovery Mode

When the device enters Factory ROM Booting, it will enter Recovery Mode, as shown below. In Recovery Mode, you can directly update the Flash memory that stores the recovery firmware.

In Recovery Mode, the device will be recognized as an MCU DFU device in Windows Device Manager.

<figure><img src="https://1681470171-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FPXCFQOBxeQet2mkpvOzb%2Fuploads%2FJTPRX0MDfqsabqqnVjYz%2Fimage.png?alt=media&#x26;token=092c4e35-5cba-4e84-9ce4-c6e6420ceb0c" alt="" width="563"><figcaption></figcaption></figure>


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